William c



(No Model.)

w. 0. HUMAN. CENTRAL DRAFT LAMP.

No. 494,862. Patented Apr. 4, 1893.

lasvmmmm Uwrrnn STATES PATENT Gaston,

WILLIAM C. ROMAN, OF MERIDEN, CONNECTICUT, ASSIGNOR TO THE EDlVARDMILLER & COMPANY, OF SAME PLACE.

CENTRAL-DRAFT LAM P.

SPECIFICATION forming part of Letters Patent No. 494,862, dated April 4,1893.

Application filed October 19. 1891. Serial No. 409,207. (No model.)

To all whom, it may concern:

Be it known that 1, WILLIAM G. HOMAN, of Meriden, in the county of NewHaven and State of Oonnecticut,have invented a new Improvement inCentral-Draft Lamps; and I do hereby declare the following, when takenin connection with accompanying drawings and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,and which said drawings constitute part of thisspecification, andrepresent, in-

Figure 1, a broken view in central section through a drafttube andair-distributor constructed in accord ance with my invention and shownin combination with an ordinal *lampfount and burner-socket; Fig. 2, adetached broken view of the draft-tube and air-distributer in verticalcentral section on the line a-ZJ of Fig. 1; Fig. 3, a View in transversesection on the irregular line ro -w of Fig. 1, showing the draft-tube,the air-distributer and the burner-socket; Fig. 4, a similar view online y-yof the same figure; Fig. 5,a broken view showing the upper endof the draft-tube in side elevation; Fi g. 6, a similar detached view ofthe air-distributor; Fig. 7, a detached plan View of the catch-flange.

My invention relates to an improvement in that class of central-draftlamps which have their draft-tuhes constructed to intercept and disposeof any oil which may find its Way into their upper ends, whereby thelamps are prevented from weeping as the saying is, and are especiallyadapted to the use of air-distributors which are set within the upperends of their draft-tubes,instead of over the same. Heretofore the tubesof such lamps have been provided with inside annular troughs,constructed to intercept and retain the oil until the same can bedisposed of through lateral openings formed in the tubes, and leadinghorizontally out of the troughs to the wick. Such old constructions havebeen found objectionable on account of the liability of the openings toclog up, causing the troughs to overflow, and also on account of thedifficulty and expense of securing the troughs within the tubes, so thatthey will not leak.

The object of my present invention is to 5 dispense with troughs such ashave been before used, and by a simple and inexpensive construction, tomake adequateprovision for the interception and disposition of any oilwhich may find its way into the upper ends of the tubes of central-draftlamps.

With this end in view, my invention consists in a draft-tube for acentral-draft lamp, having its outer surface forced inward to form oneor more oil-pockets opening at its or their upper end or ends into thebottom of acatchflange located within the tube.

Myinvention further consists in certain details of construction andcombinations of parts as will be hereinafter described and pointed outin the claims.

As herein shown, the exterior surface of the draft-tube A, which is ofordinary construction, is forced inward in any-suitable manner toproduce two comparatively wide and deep vertical oil-pockets D D theupper ends of which open into the bottom of an annular catch-flange 13,located within the tube, while their lower ends taper out and graduallymerge into the full exterior diameter of the same. The said catch-flangeB, is secured in place by solder C, and is constructed in its bottomwith two discharge-openings B B, which align with the upper ends of thesaid oil-pockets, the same being opened into the inside of the tube byslitting the same transversely across their upper ends, as at D D, andforcing the metal below the said slits inward when the pockets areformed. 1 do not, however, limit myself to forming the catchflange andestablishing communication between the same and the oil-pockets in themanner described, my invention contemplating, broadly, oil-pocketsproduced in the exterior surface of a draft-tube, located below acatch-flange situated within the same, and communicating at their upperends with the said flange. Each of the pockets formed in accordance withmy invention as above described, is capable of containing a considerableamount of oil, so that the weight of the oil aids in its absorption bythe wick, a large area of which is exposed by each pocket. Furthermore,the agitation of the oil confined in the pockets, and consequent uponthe move ment of the wick up and down, assists the process of disposingof the oil. It should be noted, also, that the oil instead of beingdischarged laterally from the flange, flows directly downward from thebottom of the same, whereby the wash of the oil has the effect ofkeeping the flange clear and free of accumulations of dbris. It will bereadily seen that under my invention I am enabled to exposea larger areaof the wick for the absorption of the oil of interception, than could bedone in any arrangement of transverse openings leading laterally out ofa trough through the tube to the wick, without weakening the tube, andprobably interfering with the right action of the lamp.

In the operation of my improved draft-tube, the oil is simply caught bythe flange, which immediatelydefiectsitinto the pockets formed in theexterior surface of the tube, where itis retained until it is disposedof by absorption by the wick, or by its return to the body of oil in thefount, whereas, under prior constructions the oil was retained in thetrough to which my flange corresponds, only so far as the interceptionof the oil is concerned.

The air-distributer F, is preferably struck up from a single piece ofmetal, and has its upper end filled with perforations. Its lower end,though of larger diameter than its upper end, is made slightly smallerthan the inner diameter of the draft-tube, to form a small annular spaceH, between them when it is in place. This space permits any surplus oilon the air-distributer to flow down between the same and the innersurface of the draft-tube, and be discharged into the catch-flange B.The extreme lower end of the air-distributer is made slightly flaring,as at G, and supported upon two inwardly projecting bumps H H, formed byinwardly upsetting the tube, as shown by Fig. 2 of the drawings, atpoints just above the level of the said. catch-flange. To steady theair-distributer it is constructed withfouroutwardlyprojectingbumpsI,which 45 are arranged at equidistantpoints around it,

and which engage with the inner surface of the upper end of the tube andsteady it, as shown by Figs. 1 and 2 of the drawings.

'By means of my invention I am enabled to employ an insideair-distributer, and at the same time avoid any leakage or weeping ofthe oil through the inside of the draft-tube, as often occurs wheninside air-distributers are used with draft-tubes of ordinaryconstruction. I also avoid that interference with the wick which anair-distributer adapted to fit over the outside of the tube, entails.

My improved draft-tube may be used in combination with central-draftlamps of any approved construction. Herein I show nothing but a fount J,and a burner-socket K.

I would have it understood that I do not limit myself to theconstruction shown and described herein, but hold myself at liberty tomake such changes and alterations therein as fairly fall within thespirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A draft-tube for a central-draft lamp, having its outer surfaceforced inward to form one or more oil-pockets each opening at itsupperend into the bottom of an annular catchflange located within thetube, substantially as described.

2. A draft-tube for a central-draft lamp, having its outer surfaceforced inward to form one or more deep vertical pockets each opening atits upper end into the bottom of an annular catch-flange located withinthe tube, substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

WILLIAM C. HOMAN.

WVitnesses:

CHAS. E. HOMAN, ALEXANDER PATTIE.

